Correct Answer: B

Rationale: In the postoperative period following CABG surgery, deep breathing exercises are essential to prevent complications such as atelectasis and pneumonia. Opioid medications can depress the respiratory system, making it crucial for the nurse to emphasize the importance of deep breathing to maintain optimal lung function. While managing pain and anxiety are important, facilitating deep breathing takes precedence in this situation to promote effective recovery and prevent respiratory complications.

Correct Answer: A

Rationale: In fat embolism syndrome (FES), fat globules enter the bloodstream and can lead to various complications, including a decrease in serum calcium levels. This occurs due to the formation of fat emboli in the vessels, which can interfere with calcium metabolism. Therefore, a decreased serum calcium level is an expected laboratory finding in a client with fat embolism syndrome.

Correct Answer: B

Rationale: In the postoperative period following CABG surgery, deep breathing exercises are essential to prevent complications such as atelectasis and pneumonia. Opioid medications can depress the respiratory system, making it crucial for the nurse to emphasize the importance of deep breathing to maintain optimal lung function. While managing pain and anxiety are important, facilitating deep breathing takes precedence in this situation to promote effective recovery and prevent respiratory complications.

Correct Answer: A

Rationale: Fluctuation of the fluid level within the water seal chamber indicates proper functioning of the chest tube. This fluctuation reflects the normal ebb and flow of air and fluid in the pleural space, demonstrating that the system is maintaining the appropriate pressure. Continuous bubbling in the water seal chamber may indicate an air leak, absence of fluid in the drainage tubing suggests a blockage, and equal amounts of fluid drainage in each collection chamber are not expected in this system.

Correct Answer: A

Rationale: An increased respiratory rate from 18 to 44/min is a significant change that should alert the healthcare professional to a potential serious complication. Such a drastic increase in respiratory rate may indicate respiratory distress or hypoxia, which are critical conditions requiring immediate attention. The other options show minor changes in vital signs that are within normal limits and are less likely to indicate a serious complication.